CVE-2011-4091
CWE-287Published: February 10, 2014· Updated: Jun 16, 2026
Official Description
The libobby server in inc/server.hpp in libnet6 (aka net6) before 1.3.14 does not perform authentication before checking the user name, which allows remote attackers to obtain sensitive information such as server-usage patterns by a particular user and color preferences.
Technical Analysis
CVE-2011-4091 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
From a weakness classification perspective (CWE-287): Authentication bypass vulnerabilities allow attackers to access protected resources without valid credentials.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (14)
Quick Facts
Related CVEs (CWE-287)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2011-4091 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts